package com.jims.master.common.utils;

public class LongTextToString {


    public static String unescape(String src) {
        StringBuffer tmp = new StringBuffer();
        if (src == null || "".equals(src)) {
            return "";
        } else {
            tmp.ensureCapacity(src.length());
            int lastPos = 0, pos = 0;
            char ch;
            while (lastPos < src.length()) {
                pos = src.indexOf("%", lastPos);
                if (pos == lastPos) {
                    if (src.charAt(pos + 1) == 'u') {
                        ch = (char) Integer.parseInt(src
                                .substring(pos + 2, pos + 6), 16);
                        tmp.append(ch);
                        lastPos = pos + 6;
                    } else {
                        ch = (char) Integer.parseInt(src
                                .substring(pos + 1, pos + 3), 16);
                        tmp.append(ch);
                        lastPos = pos + 3;
                    }
                } else {
                    if (pos == -1) {
                        tmp.append(src.substring(lastPos));
                        lastPos = src.length();
                    } else {
                        tmp.append(src.substring(lastPos, pos));
                        lastPos = pos;
                    }
                }
            }
            return tmp.toString();
        }
    }

}
